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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

27603 results found.

  1. GRB 071117: Swift detection of a bright burst
  2. Swift detection of MXB 0656-072
  3. ATCA radio observations of short hard burst GRB 071112B
  4. Correction to the Swift-BAT Transient Identification (trigger=296683)
  5. GRB 071112C: optical observation
  6. GRB 071112C MITSuME Akeno early optical observation
  7. GRB 071112B: 2nd epoch of Magellan i-band imaging
  8. GRB 071112C: SARA upper limit
  9. GRB 071112C: Swift-BAT refined analysis
  10. GRB 071112C: Swift/UVOT observations
  11. GRB 071112C: Swift XRT refined analysis
  12. Swift UVOT upper limits of GRB071112B
  13. GRB 071112B: Magellan i-band imaging
  14. GRB 071112B: Swift-XRT preliminary analysis
  15. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  16. Swift-BAT trigger 296491 is not a GRB
  17. GRB 071112C: TAROT Calern observatory optical observations
  18. GRB 071112C: ROTSE-III Confirmation of Optical Counterpart
  19. GRB 071112B: ROTSE-III Rapid Optical Limits
  20. GRB 071112C: Swift detection of a burst with an optical counterpart
  21. GRB 071112B: Swift detection of a short hard burst
  22. GRB 071112: Swift detection of a possible burst
  23. Swift/UVOT initial analysis of GRB071109
  24. GRB 071109: further Swift-XRT analysis
  25. GRB 071109: TAROT Calern observatory optical observations
  26. GRB 071109: Swift-XRT possible X-ray counterpart
  27. GRB 071104: Swift-XRT Team Refined Analysis
  28. GRB 071104: Possible Swift UVOT Afterglow Candidate
  29. GRB 071104: Swift-XRT position
  30. Swift XRT and UVOT observations of GRB071028B
  31. GRB 071101, Swift-BAT refined analysis
  32. GRB 071101: Swift-XRT Team refined analysis
  33. GRB071101: Optical and NIR upper limits by KANATA
  34. GRB0711101: Two new source from Xinglong TNT observation
  35. GRB 071101: TAROT Calern observatory optical observations
  36. GRB 071101: Swift XRT position
  37. GRB 071101: BOOTES-2 prompt optical observations
  38. GRB 071101: a nearby galaxy
  39. GRB 071101: Swift detection of a burst
  40. GRB 071031, Swift-BAT refined analysis
  41. GRB 071031: Swift/UVOT detection of afterglow
  42. GRB 071020: MITSuME Akeno optical observations
  43. GRB 071031: VLT high-resolution spectroscopy
  44. GRB 071031: GROND detection in all bands
  45. GRB 071031: Swift detection of a burst with an optical counterpart
  46. GRB 071028B Swift-BAT detection of a burst
  47. GRB 071028: SARA observations of variable source
  48. Swift UVOT upper limits to GRB071028
  49. GRB 071028: Swift-XRT Team refined analysis
  50. GRB 071028, Swift-BAT refined analysis
  51. GRB 071028: Swift detection of a burst
  52. GRB 071025: Kuiper Telescope Optical Observations
  53. GRB 071018: Revised BAT position
  54. GRB 071025A: RAPTOR Observations of Complex Early Optical Behavior
  55. GRB071021: MARGE Optical Limits
  56. GRB071020, optical upper limit
  57. GRB 071025: SARA VRI upper limits
  58. GRB 071025A: Complex Early-Time IR Behavior, Simultaneous with Gamma- and X-rays
  59. Swift UVOT upper limits
  60. GRB 071025, Swift-BAT refined analysis
  61. GRB 071025: Early Super-LOTIS Observations
  62. GRB 071025: ROTSE-III Refined Analysis
  63. GRB 071025a: PAIRITEL observations
  64. GRB 071025: ROTSE-III Detection of Optical Counterpart
  65. GRB 071025: Swift detection of a burst
  66. GRB 071020: SARA observations
  67. GRB071021: MITSuME Okayama Optical Upper Limits
  68. GRB 071021: optical and NIR observations
  69. GRB 071021: possible high-z burst
  70. GRB 071021, Swift-BAT refined analysis
  71. GRB 071021: Swift-XRT Team refined analysis
  72. Konus-Wind observation of GRB 071020
  73. GRB 071021: Faulkes Telescope South optical candidate
  74. GRB 071021: Swift detection of a burst
  75. GRB 071010B: Independent Confirmation of Break
  76. GRB 071020: Swift-XRT refined analysis
  77. GRB 071020, Swift-BAT refined analysis
  78. GRB 071020: ROTSE-III Analysis of Optical Counterpart
  79. GRB071020 - SDSS Pre-burst Observations
  80. GRB 071020: Swift detection of a bright burst
  81. GRB 071020A: ROTSE-III Detection of Optical Counterpart
  82. GRB 071018: Mercator Telescope optical observations
  83. Swift autonomous slewing re-enabled
  84. GRB 071018: SARA observations
  85. GRB 071018: Swift-XRT observation
  86. GRB 071017 - Swift XRT observations
  87. VLA radio observation of GRB 071018
  88. GRB 071018: Possible OT from Xinglong TNT observation
  89. GRB 071010A: Late-time Keck/LRIS photometry - possible host galaxy and jet break
  90. GRB 071018, Swift-BAT refined analysis
  91. GRB 071018?: Swift detection of a possible burst
  92. GRB 071010B: Suzaku WAM observation of the prompt emission
  93. GRB 071013: 3rd TLS Epoch - constraints on variability
  94. GRB071013: optical observations
  95. GRB 071011: MITSuME Optical Observations
  96. GRB 070920A: deep optical observations at the NOT
  97. GRB 071010B: Photometry after 1.6 days
  98. GRB 071013: TLS Upper Limit
  99. GRB 071013: Optical observations
  100. GRB 071013, Swift-BAT refined analysis

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